| Southborough to Masanasa | 812.58 mi (1,307.72 km) |
| Southborough to Masquefa | 671.21 mi (1,080.22 km) |
| Southborough to Matadepera | 665.52 mi (1,071.05 km) |
| Southborough to Mazarron | 940.19 mi (1,513.09 km) |
| Southborough to Meco | 752.66 mi (1,211.28 km) |
| Southborough to Medina del Campo | 724.41 mi (1,165.83 km) |
| Southborough to Medina Sidonia | 1,060.00 mi (1,705.91 km) |
| Southborough to Mejorada del Campo | 763.93 mi (1,229.43 km) |
| Southborough to Meliana | 804.28 mi (1,294.36 km) |
| Southborough to Mengibar | 932.87 mi (1,501.31 km) |
| Southborough to Merida | 905.37 mi (1,457.06 km) |
| Southborough to Miajadas | 884.47 mi (1,423.42 km) |
| Southborough to Mieres | 615.17 mi (990.02 km) |
| Southborough to Miguelturra | 866.84 mi (1,395.04 km) |
| Southborough to Mijas | 1,034.55 mi (1,664.94 km) |
